Guest 49 plymouth Posted May 8, 2015 Share Posted May 8, 2015 Hi I am trying to sort some problems with my AC. The car was stood for many years and has thd older coolant. Firstly when ever you switch the ignition on the heater fan runs on its lowest setting regardless of where I set the switches. Secondly the AC pump wont cut in. If I bridge any two off the three wires coming from the pump the clutch cuts in and runs smoothly. I notice the pipe coming from the bottom of the heater box turns white with frost almost straght away. Whille it is running like this the AC on off switch works correctly and I checked the pressure and its spot on. The pipe I mentioned that runs out of the bottom of the heater box that gets ice cold does so up to a valve that has a thin copper wire coming from it that returns to the heater box- somthing like the wire or tube that you would see on a old temperature sender. The system beyond this fails to get very cold and the air from the vent it not particularly cold. Link to comment Share on other sites More sharing options...
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